Abstract A new 3D binder-free ternary Fe–Ni–Co oxide nanoflake arrays on Ni foam was synthesized using a simple facile two-step process. The as-prepared supercapacitor electrode showed excellent electrochemical performance, such as a high specific capacitance of 867 F g−1 and excellent cycling stability (92.3% capacitance retention after 10,000 charge–discharge cycles). In addition, an aqueous hybrid asymmetric supercapacitor device based on this material exhibited high energy density of 40 Wh kg−1 and excellent capacitance retention of 87.4% after 5000 cycles. This outstanding electrochemical performance highlights the potential of this 3D mesoporous ternary mixed-metal oxide electrode in commercial high performance supercapacitors.

中文翻译：

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用于高性能超级电容器应用的镍泡沫上的介孔 Fe-Ni-Co 三元氧化物纳米薄片阵列

摘要 在泡沫镍上合成了一种新的 3D 无粘合剂三元 Fe-Ni-Co 氧化物纳米薄片阵列，使用简单的两步法。所制备的超级电容器电极显示出优异的电化学性能，如 867 F g-1 的高比电容和优异的循环稳定性（10,000 次充放电循环后电容保持率为 92.3%）。此外，基于这种材料的水性混合非对称超级电容器装置在 5000 次循环后表现出 40 Wh kg-1 的高能量密度和 87.4% 的优异电容保持率。这种出色的电化学性能凸显了这种 3D 介孔三元混合金属氧化物电极在商用高性能超级电容器中的潜力。